wilson



Fb. 5, 1946. P. WILSON 2,394,349

GAS TORCH Filed Aug., 28', 1945 as e5 /40 la f4 az 27 5 56 ze so 52 Z9 A A '5l PETE/T WILSON Patented Feb. 5, 1946 GAS TORCH',

Peter Wiisom- Vancouver; Eri-'tislt folumbiag. Canada?.

Appiieaeoneugusf. 2s, 1943;, saisine. emigrar (o1. erf-zon My invention. relates. to. improvementsv in. gas torches which are particularly. adapted for use. in. torches using. acetylene: or other gas under pressure..

In. torches. equipped with ignitersf trouble. has; been. manifested; in obtaining such a. spark as to ensure the gas passing. through the torch. igniting. with each operation. of theignitenit. being usua-l-- ly necessary for the igniter to bee operated twoor more times,A which. results inf loss of gasI and excessive wear ot lighter ilints etc; This: defect is= appaoentlyv due.- tol the iiint being; lett irr the tubular. passage throughv which the gasI flowstoWar-.ds the. .ietv or the. torch. I. have! discovered that.` it' theflint is only within the gas iiow passage during ignition; that the torch may be.A liti at any.' time: without' failure.

he objects of the invention are to" provide meansA whereby a combustiblemixture ot gas-and air is passed. through azoneinf which. it may bie; instantly ignitedz by a so-calledi flint to light the. torch: and: to causel the gas' toby-pass said zone immediately following ignition.. Further objects* are to prov-idemea'ns for admitting; gas. to2 the. zone immediately' prior to* the necessary fric` tionalY movement uponsaid flint...

Thex invention consists essentially off a. torch.

having' a main gas tube and. an'. ignition? zone adjacent. the` gas tube andi means fori providing communication: between said'. tiub e. and'v zone prior to: ignition;A as: will. be more fully described in the following specication and shown in the ac' ccmptanying drawing, in which- Fi 1 is a sectional view of the torch.

Fig. 2 is a perspective View of the trigger and its pawl.

In the drawing like characters of reference indicate corresponding parts in each figure.

The numeral i indicates the body of the torch which is in the form of a pistol having a grip 2 and a barrel 3. The body is bored to provide a plurality of passages, viz. a supply passage 4 extending vertically through the grip 2 having a hose spigot 6 at its lower end for connection to a gas supply hose and communicating with a needle valve 'I by which the volume of gas to the tool is controlled. A passage 9 extends from the needle valve 'i to a spring closed valve Ill and a passage I2 leads from the valve It through a jet It disposed in the longitudinal axis of the barrel 3.

The valve It is provided with a stem I which extends into a trigger pocket I6 and lies in the pathv of a trigger I8, which is pivoted upon a pin I 9. Surrounding the jet I4 within the barrel 3. is. a. Venturi tube 22 having a plurality ot" air inlet openings. 23.. which. communicate. with. the space within the barrel,. which. barrel isA open` to. the atmosphere through. the. trigger pocket, IIS...

, The Venturi tube. 221s providedwith. a, shoulder 25 which forms an. abutment. for. a. spring; 2l. Secured. withinl the= front. end. of. the. barrel. 3' is. a. barrel extension. 28 having aA nozzle 29.Y alignment'withthe iet I-.llrand the Venturi tube 22. Slidably mounted withinthe. bore of the- 'barrel extension 2S, and uponi the. outer periphery of. the. Venturi' tulo-e 22. is a sleeive 3B. having. aty

its outer: end a: reduced portion. 34, which. when extended.L or in. normal position donnes` an ignition chamber 3:2. Whichfis substantiallyclosed; oft from; the interior'of thefs-leevaby'the end: ot the: portion. 3 I substantially sea-.ting at.' the innerv endr of'. the. nozale 29. The: reduced portion. 31I= is threaded to form a. tile: 3ft.. The: sleeve 35i is; provided; with an. external fia-nge. Stadjacent its inner end. and the. extremity' of. saidv sleeveabuts the spring 2"'I whichY urges the: sleeve forwardlyr towards. itsnormal positiorr asshown..

A." flint. housing 33: is tormed. onA the` underside: o the barrel extension: 2t im which. is. mounted'. a. recessed: nutl @a having. au coill spring: ttf for` urging; a flint. di intoA abrading contact with: ther le: 34

Mounted'. a pin it? is' an Vf-sliapedrocker lid hai/'ing a: ngjerv l5 which: engages the: iiange: Sti'- Iio retract; the' sleeve dit against' the spring 2d. 'Ehe rocker'isialscr provdedzwith alatch it which: is normally engaged; by a. hook: @taf of; a;A pasti'I till. The pawl 5t is pivotally mountedithe". trigger. I8 upon a pin 5I and is urged towards engaging position with the rocker latch l by a spring 52, see Figure 2. The rear end 53' of the pawl 5% is adapted to engage a cam 54 which forms the rear surface of the trigger pocket I6, as the trigger approaches its rearmost position, as indicated in dotted line in Figure 1 to raise the hook t9 of the pawl and release the latch il of the rocker dfi.

In operation, the torch having been connected to a suitable source of gas supply is held in the hand ready for use. Pulling the trigger I3 the hoo-k 4S of the pawl 56 which is in engagement with the latch lil of the rocker it causes said rocker to swing in an anti-clockwise direction and retract the sleeve 30, withdrawing the extremity of its reduced portion 3i from the inner end of the nozzle so that the ignition chamber 32 becomes momentarily a cylindrical space betweenthe outer end of the portion 3| and the nozzle. As the trigger moves rearwardly it strikes the stem l5 of the valve l0 and allows gas to flow through the jet i4, the Venturi tube 22 where a suitable amount of air is induced into the stream through the openings 23 and through the sleeve 30 to the enlarged space of the ignition space. The ultimate rearward movement of the trigger causes the end 53 of the pawl 50 to engage the cam 54 and rock the pawl so that its hook is raised out of the latch 41 of the rocker, this releases the rocker and the spring 21 forces the sleeve 30 forwardly thus causing the le 34 to abrade the iiint and cause the spark necessary to ignite the gas in the chamber. The force of gas and air following the volume ignited causes the flame to pass out through the nozzle 29 where it will continue to burn. The closing 0E of the ignition chamber prevents unburned gas and air from again entering the ignition chamber while the torch remains in use and while the trigger is held in its rearward position as shown in dotted line in Figure 1. On releasing the trigger, the valve I0 closes, shutting off the gas flow and the hook 49 of the pawl 50 slides over the latch 41 of the rocker 44 to engage it ready to retract the sleeve 30 when it is again necessary to ignite the torch.

What I claim as my invention is:

1. A torch comprising a body having a jet and a nozzle, an ignition chamber between the jet and the nozzle, an abrasive igniter within the ignition chamber, means concentric with the jet and the nozzle normally closing oi the ignition chamber from the jet and the nozzle, means to open the closure, and means for actuating the igniter.

2. A torch comprising a body having a jet and a nozzle, an ignition chamber between the jet and the nozzle, an abrasive igniter within the ignition chamber, means concentric with the jet and the nozzle normally closing oi the ignition chamber from the jet and the nozzle, means to open the closure and means for actuating the igniter when the closure is being returned to normal position.

3. A torch comprising a body having a jet, a barrel extension and a nozzle and a normally closed valve controlling the gas supply to the jet, a retractile sleeve forming a passage between the jet and the barrel extension, a spring for holding the sleeve in normal position, an ignition chamber surrounding the sleeve and normally separated therefrom, an igniter within the ignition chamber and a trigger carried by the body for retracting the sleeve to form a means of communication between the jet and the ignition chamber for opening the valve to admit gas to the chamber and for actuating the igniter.

4. A torch comprising a body having a gas passage, a jet and a nozzle in communication with said jet, an ignition chamber adapted to be brought Vinto communication with the nozzle, means concentric with the jet and the nozzle for closing oi the ignition chamber from the nozzle. an ignter within the ignition chamber, means for actuating the igniter, and means for establishing communication between the ignition chamber and the nozzle.

5. A torch comprising a body having a jet, a barrel extension and a nozzle and a normally closed valve controlling the gas supply to the jet, a retractile sleeve forming a passage between the jet and the nozzle, a spring for holding the sleeve in normal position, an ignition chamber surrounding the sleeve and normally separated from said passage, an igniter within the ignition chamber and a trigger carried by the body for retracting the sleeve to form a means of communication between the jet and the ignition chamber for opening the valve to admit gas to the chamber and for actuating the igniter, and means for releasing the sleeve to close oif the ignition chamber from the passage between the jet and the iiam'e tube.

6. In a torch having a jet, a tubular member spaced therefrom, a normally closed valve controlling the gas supply to the jet, a trigger for opening the valve, a spring pressed sleeve slidable between the jet and the tubular member, a rocker engaging the sleeve, said rocker having a latch, a pawl pivotally mounted intermediate its ends upon the trigger, one of said ends being adapted to engage the latch to retract the sleeve and the other of said ends being adapted to engage a surface of the torch when the trigger is manually actuated to disengage the pawl from the rocker.

'7. .A torch comprising a body and barrel having a barrel extension terminating in a nozzle, said body having a gas inlet, a spring closed valve, a jet and a trigger for opening the valve to admit gas to the jet, a Venturi tube surrounding the jet, a retractile sleeve slidably movable upon the Venturi tube and within the barrel extension, said sleeve dening an ignition chamber within the barrel extension when in extended position and forming a communication between the interior of the Venturi tube and the ignition chamber when retracted, means for sliding the sleeve, and means for igniting the gas owing into the ignition chamber in response to manual movement of the trigger.

PETER WILSON. 

